[Xylose(glucose) isomerase reactivity of immobilized Arthrobacter sp].

The study of the xylose/glucose isomerase-containing Arthrobacter sp. B-5 cells immobilized in cobalt hydroxide gel showed that immobilization increases the substrate affinity of the enzyme, its thermo- and pH-optima of action and stability, and makes unnecessary the addition of stabilizing cobalt ions to the isomerization medium.

[Comparative study of xylose(glucose) isomerase synthesis in Arthrobacter strains].

The substrate specificity of isomerases produced by six strains of Arthrobacter sp. was studied. The role of utilizable carbon sources in controlling enzyme biosynthesis was established.